Rebel tanks are drawn up in front of the presidential palace in Saigon, on Nov. 3, 1963, during coup that brought the downfall and death of South Vietnam President Ngo Dinh Diem and his brother Ngo Dinh Nhu.AP

Rebel tanks are drawn up in front of the presidential palace in Saigon, on Nov. 3, 1963, during coup that brought the do